Merrimac, VA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Merrimac, a community in Montgomery County, Virginia.
Today
78°F
Patchy Fog then Partly Sunny
Patchy fog before 9am. Partly sunny, with a high near 78. East wind around 5 mph.
7-day forecast for Merrimac
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Patchy Fog then Partly Sunny | 5 mph E | 10% |
| Tonight | 64°F | Mostly Cloudy then Patchy Fog | 5 mph SE | 9% |
| Sunday | 82°F | Patchy Fog then Chance Showers And Thunderstorms | 5 mph S | 48% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms then Mostly Cloudy | 3 mph SW | 38% |
| Monday | 80°F | Showers And Thunderstorms | 0 to 3 mph NE | 87% |
| Monday Night | 59°F | Showers And Thunderstorms | 6 mph E | 87% |
| Tuesday | 67°F | Showers And Thunderstorms Likely | 7 mph E | 65% |
| Tuesday Night | 55°F | Showers And Thunderstorms Likely | 9 mph E | 65% |
| Wednesday | 59°F | Chance Rain Showers | 9 mph E | 51% |
| Wednesday Night | 53°F | Chance Showers And Thunderstorms | 8 mph NE | 47% |
| Thursday | 65°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 7 mph NE | 36% |
| Thursday Night | 52°F | Slight Chance Showers And Thunderstorms | 5 mph NE | 22% |
| Friday | 68°F | Slight Chance Rain Showers | 5 mph N | 19% |
| Friday Night | 50°F | Slight Chance Rain Showers | 3 mph N | 19% |
Forecast source: National Weather Service (api.weather.gov) for Merrimac (37.195, -80.422). Updated through the day.
Growing snapshot for Merrimac
Last spring frost
Apr 24
First fall frost
Oct 19
Growing season
175 days
Hardiness zone
7a
More local growing data for Merrimac: nearby ZIP 24061 weather · frost dates · planting calendar · Virginia frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Blacksburg Nwso, Va (1.6 mi from Merrimac). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.